/*
 * Copyright (c) 1983, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "SYS.h"

#if defined(SYSLIBC_SCCS) && !defined(lint)
        /* .asciz "@(#)sbrk.s   8.1 (Berkeley) 6/4/93" */
RCSID("$NetBSD: sbrk.S,v 1.13 2014/03/18 18:20:37 riastradh Exp $")
#endif /* SYSLIBC_SCCS and not lint */

        .globl  _end
        .globl  _C_LABEL(__minbrk)
        .globl  _C_LABEL(__curbrk)
        .hidden _C_LABEL(__minbrk)
        .hidden _C_LABEL(__curbrk)

#ifdef WEAK_ALIAS
WEAK_ALIAS(sbrk, _sbrk)
#endif

        .data
_C_LABEL(__minbrk):
        .long   _end
_C_LABEL(__curbrk):
        .long   _end
        .text

ENTRY(_sbrk, 0)
        moval   _C_LABEL(__curbrk),%r5
        addl3   (%r5),4(%ap),-(%sp)
        pushl   $1
        movl    %ap,%r3
        movl    %sp,%ap
        chmk    $ SYS_break
        jcs     err
        movl    (%r5),%r0
        addl2   4(%r3),(%r5)
        ret
err:
        jmp     CERROR+2
END(_sbrk)